Physical layer security of underlay cognitive radio using maximal ratio combining |
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| Authors: | Hui Zhao Dan-yang Wang Chao-qing Tang Ya-ping Liu Gao-feng Pan Ting-ting Li Yun-fei Chen |
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| Affiliation: | 1.School of Electronic and Information Engineering,Southwest University,Chongqing,China;2.School of Electrical & Electronic Engineering,Newcastle University,Newcastle upon Tyne,UK;3.School of Mathematics and Statistics,Southwest University,Chongqing,China;4.School of Engineering,University of Warwick,Coventry,UK |
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| Abstract: | We investigate the secrecy outage performance of maximal ratio combining (MRC) in cognitive radio networks over Rayleigh fading channels. In a single-input multiple-output wiretap system, we consider a secondary user (SU-TX) that transmits confidential messages to another secondary user (SU-RX) equipped with M (M ≥ 1) antennas where the MRC technique is adopted to improve its received signal-to-noise ratio. Meanwhile, an eavesdropper equipped with N (N ≥ 1) antennas adopts the MRC scheme to overhear the information between SU-TX and SU-RX. SU-TX adopts the underlay strategy to guarantee the service quality of the primary user without spectrum sensing. We derive the closed-form expressions for an exact and asymptotic secrecy outage probability. |
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